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Notes2.3

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liquefaction- when the earthquakes shaking turns soft soil loose into mud
aftershock- a small earthquake that occurs after a big earthquake
tsunami- when earthquakes happen underwater it causes big waves
base- isolated building- a building designed to reduce the energy that reaches the building during an earthquake

How Earthquake Cause Damage

• local soil condition
  • lose soil shakes more vilently than solid rock
• liquefactition
  • liquefaction turns moist soil into watery mud and cracks
  • buildings may sink into the liquid mud
• aftershocks
  • aftershocks is are small earthquakes caused by a mager earthquake
• tunamis
  • tunamis are caused by underwater earthquakes
  • some tunamis are the hight of six-story building

Making Buildings Safer

• new buildings must be more stonger and flexible
• choice of location
  • do nots build buildings on:
    • steep slopes
      • steep slopes may cause landslides
    • filled land
      • filled land shakes more violently
    • near faults
      • earthquakes may occur at any time
  • safe to build buildings on :
    • away from faults
    • earthquakes may be less violent
• construction method

Protecting Yourself During an Earthquake

• the main danger is falling objects and flying glass
  • if there are table or desks, get under it quickly, and hold it steady
  • if you don't have a desk, go to a inner wall and hold your head